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    STUDIA BIOLOGIA - Issue no. 2 / 2007  
         
  Article:   MICROORGANISM POPULATIONS WITHIN GELATINOUS FORMATIONS FROM KIESBERG MINE IN BANAT MOUNTAINS, ROMANIA.

Authors:  VASILE-DANIEL GHERMAN , JEAN-GABRIEL BRÉHERET, MIHAIL DRĂGAN-BULARDA. 		 
       
         
  Abstract:  This study concerns the gelatinous formations found in the Kiesberg gallery, part of an old mine located in the South-West of Romania which was dug in the metamorphic rocks of auriferous sulphides from the Policarpus ore. These gelatinous formations are being supplied with a variable flow of infiltration rainwater. Microbiological determinations and numerical estimates have been carried out in years 2004 and 2005, for two hydrological different seasons, a wet one and a dry one. A percentage estimate of different physiological groups has also been realized. The gelatinous formations from the Kiesberg mine represent a complex assemblage formed by (1) chemolitotroph acidophilic microorganisms (water pH 2.8) which dominate during stages of high water supply and (2) by heterotrophic microorganisms rather abundant during stages of low water supply. The ratio between the two kinds of microorganisms is therefore variable depending on the water supply and other environmental factors.  
         
     
         
         
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